Table 1.
Sample characteristics by study group (N=69)
| COC+ / HIV+ N=15 |
COC+ / HIV− N=16 |
COC− / HIV+ N=17 |
COC− / HIV− N=21 |
Statistic | |
|---|---|---|---|---|---|
| Demographic characteristics | |||||
| Male, % | 80% | 63% | 65% | 67% | χ2(3)=1.32 |
| Age in years, M (SD) | 48.60 (6.89) | 44.38 (6.22) | 42.59 (8.69) | 42.00 (8.79) | F(3,65)=2.37 |
| Education in years, M (SD) | 12.47 (2.23) | 12.06 (2.82) | 14.18 (2.27) | 13.67 (2.50) | F(3,65)=2.71 |
| Ethnicity, % | χ2(6)=4.29 | ||||
| African American | 87% | 75% | 82% | 67% | |
| Caucasian | 7% | 19% | 18% | 19% | |
| Other/Mixed | 7% | 6% | 0% | 14% | |
| Premorbid verbal IQ, M (SD) | 87.67 (10.96) | 88.38 (14.90) | 90.35 (18.32) | 94.90 (15.58) | F(3,65)=.85 |
| Cocaine use characteristics | |||||
| Years of regular use, M (SD) | 18.87 (7.06) | 15.19 (9.66) | N/A | N/A | F(1,29)=1.45 |
| Days of use in past 90 days, M (SD) | 39.27 (28.67) | 34.25 (23.88) | N/A | N/A | F(1,29)=.28 |
| Current cocaine dependence, % | 100% | 88% | N/A | N/A | χ2(1)=2.00 |
| Days since last use at MRI, M (SD) | 2.13 (1.55) | 4.88 (5.99) | N/A | N/A | F(1,29)=2.95 |
| Other substance use in past 90 days | |||||
| Any alcohol to intoxication, % | 87% | 75% | 29% | 33% | χ2(3)=17.01*** |
| Days of use, M (SD) 1 | 25.62 (25.26) | 41.75 (29.61) | 9.40 (10.16) | 12.86 (10.30) | F(3,33)=3.33* |
| Any marijuana use, % | 67% | 44% | 6% | 5% | χ2(3)=23.07*** |
| Days of use, M (SD) 1 | 31.50 (35.74) | 43.00 (35.15) | 3.00 (N/A) | 14.00 (N/A) | F(3,15)=.52 |
| Any nicotine use, % | 67% | 69% | 29% | 15% | χ2(3)=15.46** |
| Days of use, M (SD) 1 | 90.00 (0.00) | 89.09 (3.02) | 74.20 (35.33) | 90.00 (0.00) | F(3,25)=1.61 |
| HIV characteristics 2 | |||||
| Years since HIV diagnosis, M (SD) | 17.00 (8.34) | N/A | 12.63 (7.39) | N/A | t(29)=1.55 |
| Nadir CD4 cell count, Mdn (IQR) | 100 (218) | N/A | 204 (244) | N/A | U=86.50 |
| Current CD4 cell count, Mdn (IQR) | 427 (449) | N/A | 573.5 (339) | N/A | U=96.00 |
| Suppressed HIV viral load, % | 53% | N/A | 69% | N/A | χ2(1)=.78 |
| AIDS diagnosis, % | 60% | N/A | 38% | N/A | χ2(1)=1.57 |
*
p < .05,
**
p < .01,
***
p < .001
1
Among persons who used the substance;
2
Medical record data was missing for one participant in the COC-/HIV+ group.